Spin Dodecamer Formation in the Double-Exchange Spin Ice Model(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• We investigated the double-exchange spin ice (DESI) model on a kagome lattice by Monte Carlo simulation to study the effects of a geometrical frustration, and the mechanism that generates an ordered state in a metallic system. The DESI model on the kagome lattice is a frustrated metallic system due to an effective ferromagnetic interaction between localized spins caused by the double-exchange (DE) mechanism and a uniaxial anisotropy for the localized spins. A dodecagonal spin cluster (named dodecamer), which consists of twelve localized spins, appears at low temperature when the number of particles per site n ⋍ 1/3-1/2. Such a dodecamer order is driven by both the kinetic energy gain due to the DE mechanism and the geometrical frustration. We discuss that cluster orders, in general, may be a common feature in itinerant electron systems coupled with frustrated adiabatic fields.

• 社団法人日本物理学会の論文
• 2004-07-15

著者

• Shimomura Y

  Applied Physics And Chemistry Faculty Of Engineering Hiroshima University

• MIYAHARA Shin

  Department of Physics and Mathematics, Aoyama Gakuin University

• FURUKAWA Nobuo

  Department of Physics and Mathematics, Aoyama Gakuin University

• SHIMOMURA Yoshihiro

  Department of Physics and Mathematics, Aoyama Gakuin University

• Furukawa Nobuo

  Department Of Physics And Mathematics Aoyama Gakuin University:multiferroics Project (mf) Erato Japa

• Furukawa Nobuo

  Department Of Physics And Mathematics Aoyama Gakuin University

• Furukawa Nobuo

  Department Of Physics Aoyama Gakuin University

• Furukawa N

  Department Of Physics And Mathematics Aoyama Gakuin University:multiferroics Project (mf) Erato Japa

• Miyahara Shin

  Department Of Physics And Mathematics Aoyama Gakuin University

• Furukawa Nobuo

  Department Of Physics Aoyama Gakkuin University

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